Reading the amazing Killers of the Flower Moon now. By the Lost City of Z guy. It's about the 1920s oil boom on the Osage reservation which made them the richest 1% in America...and the resulting serial killings that almost wiped out the upper echelon of the tribe, perpetrated by wealthy oil barons trying to steal land... And so gruesome and over the top it required a special federal investigative Bureau, placed under the command of a young upstart by the name of J. Edgar Hoover...

Halfway through and loving it. Though it lacks the swashbuckling of Z. It's more or a procedural.